JPS58123999A - Excavating and propelling method and its device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a propulsion method and excavator that propels and lays a pipe into the ground using jacks in a starting pit, which is impossible with conventional propulsion methods and excavators. The purpose is to enable recovery of the excavator (excavation drive unit) to the starting pit in the event of unexpected trouble with the excavation face or excavation equipment, and to take appropriate measures to prevent this. Demeru.

When propelling and burying steel pipes, humid pipes, etc. underground, starting pits and reaching pits are provided at predetermined intervals, and the work of joining and propelling single pipes in the starting pits is repeated until the pipes are penetrated to the reaching pit. This propulsion equipment generally propels the pipe by using the driving force of an auger head, the rotational driving force of the auger for excavation, the carrying out of excavated sand, and the propulsion force of a hydraulic jack. Swinging by Jatsuki When the blade mouth is swung, it is done by K.

The first wA shows an example of such a conventional excavation propulsion device, and its configuration will be explained. Excavators are equipped with steel pipes, propulsion pipes such as Hiem pipes (a), and carage in India (b).
), excavator casing (d), oscillating blade opening (e), auger head (f), auger (b), soil removal pipe color), correction jack (1) to 9, this K is the propulsion method. What is being said is the current situation.

However, such conventional propulsion methods and devices have the following problems.

(a) A rotary drive device (not shown) installed in the starting pit for the rotational driving force of the auger head (s) and auger head (s)
It is given by K. Therefore, as the propulsion distance increases,
The torque required to launch the excavator increases, which necessitates an increase in the strength of the auger's rotating shaft and the rotational drive device, which limits the propulsion distance and the maximum applicable pipe diameter. .

Generally speaking, the propulsion distance is said to be 50m for a class tube with an outer diameter of φ600m.

(b) If trouble occurs at the face (for example, when gravel, wood chips, iron plates, or other obstacles that cannot be taken in occur in the propulsion path), the diameter of the swinging blade opening (e) is φ.
Since the diameter φD of the auger head (f) is larger than D, it becomes impossible to retrieve the auger head (f) to the starting pit. Hori~J is
In order to reduce the propulsion resistance, an auger head f) larger than the outer diameter of the swinging blade opening (e) is applied, or a loose excess mb is applied.
Since this type of auger head (f) is adopted, it is completely impossible to recover the auger head (f) in the event of trouble. In other words, in the case of the previous case (b) and this case, the face must be excavated from the ground surface and the obstruction must be removed.

The present invention has been made to solve the above-mentioned conventional problems.

The gist of the cutting propulsion method of the present invention is that, in a propulsion method in which a pipe is propelled into the ground by a jack or the like installed at a starting pit, a part of the cutting cut can be deflected by an oscillating jack. In the central space of the swinging blade opening, there is provided a drive device and a cutter section which is disposed inside the drive device and has nine soil removal holes and which is removed by the drive device. When a cutter is provided, a part of the cutter and a driving device are recovered to a starting bit through a pipe as necessary.

Furthermore, the transom propulsion device of the present invention is a device used in the method of the present invention described above, and its gist is that a cutter section equipped with a cutter that can be freely lowered forward, its rotating shaft, and an excavator. A swinging blade opening connected to the casing via a watertight seal and provided to fix a driving device for driving the rotating shaft in the central space, and a space between the swinging blade opening and the excavator casing. 4 or 2 jack pins are provided in the drive device, one end of which is pin-coupled to the excavator casing and the other end of which is provided in a free jack head, which passes through the mounting flange of the drive device and is fixed to the swinging tuyere. It is characterized by comprising a direction correction jack, an earth removal pipe provided continuously with an earth removal hole having an inner thigh opening on the side surface of the drive device, and a spherical seat provided near the front end of the earth removal pipe. This is an excavation propulsion device.

That is, the present invention relates to an excavation propulsion method for propelling and laying a pipe into the ground using a jack or the like installed on a starting bit, and an excavation propulsion device used in the method. Next, the Hori' propulsion device of the present invention will be explained in detail based on the embodiments shown in FIGS. 2 to 7. The basic configuration includes the cutter part (1), the rotating shaft (7), the drive device (8), the direction correction jack 03, the earth removal pipe, the swinging blade opening ■, the excavation casing Cυ, the water stop seal, and the water pressure feed pipe. It depends on the device that uses the device consisting of (c). In addition, the cutter section (1
) is connected to the rotating shaft (7) by connecting each flange with bolts and nuts, and the rotating shaft (7)
The cutter part (1) is composed of a fixed part (2) and a rotating part (3), each of which is driven by a bin (4). Rotating part (3
) is attached so as to be freely foldable forward in the direction of propulsion, as shown by the dashed line in FIGS. 2 and 6. In addition, the reaction force of the cutter rotation part (to) during excavation is the cutter shirt) (5) K
It is connected and received from nine reaction force receivers (6) K. Rotating shaft (7)
The rotational torque from the drive device (8) is transferred to the cutter section (1).
The drive device (-), which is connected to the K-transmitting shaft, is composed of a hydraulic motor and a reduction gear, and generates the power source for excavation. The base (rearward in the direction of propulsion) K of the drive device (1) has a fixing hole a for fixing the drive device (1) to the swinging blade opening by passing a jack pin (described later) K.
A mounting flange (9) having a shape of It has become.

Four or two direction correction jacks a1 are provided at equal intervals in the circumferential direction between the excavator casing Qη and the swinging blade mouth weight, and one end is connected to the excavator casing Qυ with a bottle (not shown). and the other end is free. A jack pin aS is coupled to the direction correction jack head fi4 fixed to this free end, and by extending the direction correction jack 0, the jack pin (ls is the fixing hole a of the drive device mounting flange (9) 2, and the companion drive device holder installed in the rocking cutter hole a penetrates to the hole r211. Therefore, the drive device (8) is securely fixed and has sufficient resistance to the rotational reaction force and thrust during excavation. The soil discharge pipe ae is a pipe for discharging excavated soil to the starting pit side, and as mentioned above, the soil discharge port αυ provided in the drive device (8)
7 langes are connected by bolts, and a spherical seat part +171 is provided near the front end. This spherical seat part aη is for responding to a change in the propulsion direction of the swinging cutting edge I. or,
This ball seat part is equipped with a rotation prevention stopper α stitch that prevents it from rotating more than necessary. If necessary, a screw conveyor or the like may be provided inside the earth discharge pipe 1e to perform soil removal. The swinging blade I has the direction correction jack α mentioned above.
It oscillates depending on the difference in the elongation of the bird's voice, and adjusts its direction during propulsion. The excavator casing am is located between the swinging blade I and the propulsion pipe (not shown), and has a direction correction jack of 0.
It is subject to a reaction force. The water stop seal (2) is provided between the swinging blade opening (II) and the fitting part of the a-tube end of the excavation casing, and a general KO ring, U seal, etc. are used.

The water pressure pipe (2) is a pipe that pumps jet water or the like for the purpose of increasing the soil removal efficiency of the pipe section.

The transom propulsion method of the present invention uses the installation configured as described above. Next, the method of the present invention will be explained in detail with reference to FIGS. Figure 8 shows the normal excavation path.
In this case, the moat 81 is propelled while the cutter portion (1) is fixed at the normal position without being lowered. Next, as a result of the above-mentioned excavation and propulsion, when trouble occurs in the cutter part (1) K), the cutter part (1) and the drive device (8)
The procedure for recovering the vehicle into a starting pit (not shown) will be explained based on FIGS. 8 to 11.

(1) Retract the direction correction jack I to the stroke end: With this operation, the cutting and driving device (8) is released from being fixed to the electric field of the swinging blade. (II) The bit starts the excavation pipe section. to a predetermined distance Lfet shown in FIG.
'J Reverse: With this operation, the drive unit # (8) is released from the swinging blade opening ol, and at the same time, the rotation 5 (3) of the cutter part (1) moves forward around the bin (4). It becomes a form of lodging - (source) earth removal pipe (IQ is rotated approximately 22.5 degrees around the pipe axis from the starting bit [Chapter 10.11
The figure shows the case where there are two direction adjustment jacks 0, rotated by approximately 45 degrees (-): Due to this operation, the drive unit mounting flange (9) is shifted from the position of the direction adjustment jacks. At this time, the earth removal pipe αe does not rotate more than necessary because the spherical seat part αη is provided with a rotation prevention stopper as, and the rotational force from the starting bit is transmitted to the drive device (8)K. 1. (2) Retract the earth removal pipe aQ from the starting bit; by this operation, the drive device (8) and the cutter section (1) can be recovered to the starting pit side.

(g) The driving device (8) and the cutter section (1) are set by the reverse procedure of the steps (1) and (2) above.

Moreover, FIG. 12 is an explanatory diagram at the time of direction correction during excavation and propulsion, and shows direction correction in relatively hard ground. The cutter part (1) has a slightly larger diameter than the swinging blade opening 1, and is in good condition due to so-called over-drilling, so that the swinging blade lower aS, the excavator casing aυ, and the ground (a) are in good condition. A tail void (b) is created in between. Therefore, from the propulsion plan line (c), the angle - [oscillation lie/(d)]
), rotate the cutter part (1) at the same time and adjust the adjustment jack in each direction while excavating the ground (a).
is actuated, and the swinging blade mouth weight, drive device (8) and cutter section (1) swing around the ball seat power of the earth removal pipe qe due to the stroke difference given by each jack tlK. Next, when the propulsion tube (not shown) is pushed by the log pushing propulsion jack (not shown) provided in the starting bit, the swinging blade mouth a causes the excavation casing force and causes the propulsion tube to be swung. Moving line (d) K approaches. By repeating this operation, the direction of the tube being propelled is corrected. The ability of the direction correction jack in this case may be smaller than that of the conventional one because the circumferential surface of the swinging blade U is in a state where the circumferential surface is over-drilled. In addition, it is well known that tail voids (b) formed on the circumferential surface of the rocking blade B11 excavator casing are injected with an appropriate backfilling agent in order to prevent the ground surface from falling under the soil law. .

Next, the effects of the present invention will be listed.

(a) It has the basic functions of a conventional excavator (excavation, correcting the direction of soil removal), and the excavation drive unit has a simple mechanism (it can be retrieved into the starting pit more easily).

(b) Therefore, if trouble occurs in the face section, drive section, cutter section, etc., it is possible to appropriately deal with it without excavating these sections from the ground surface.

(c) Furthermore, when the soil condition in the excavated ground changes, K
Similarly, the cutter shape and position can be exchanged and adjusted.

(→If necessary, the direction can be corrected from time to time by incorporating a direction detection device consisting of a target, an inclinometer, etc., and a swing detection device such as a displacement meter.

(E) For the purpose of stabilizing the face, mud water pressurization type, mud balance type, etc. can be incorporated, and it can be applied not only to small and medium diameter pipes but also to large diameter pipes.

(f) Since the cutter drive unit and the soil removal drive unit are separated, long-distance cutting is possible.

[Brief explanation of the drawing]

FIG. 1 shows a conventional excavation propulsion device [7, (a) is a longitudinal sectional view, and Cb) is a front view of the main part. Figures 2 to 7 show the 1m191 propulsion arrangement of the present invention, Figure 2 is a longitudinal cross-sectional view, Figure 5 is a view taken along arrows B-B and CC in Figure 2, and Figure 4 is an enlarged view of the drive part. 5 is a view along the line D--D in FIG. 4, FIG. 6 is a partially enlarged view of the cup, and FIG. 7 is a view along line-E in FIG. 2. Figures 8 to 12 are explanatory diagrams of the excavation and propulsion method of the present invention, and Figure 8 is a longitudinal cross-sectional view during normal excavation and propulsion, and Figures 9 and 10.
The figure is a longitudinal cross-sectional view showing the procedure for lowering the cutter unit forward.
Fig. 11 is a longitudinal cross-sectional view of the cutter section and drive device when they are recovered in the pipe, and Fig. 12 is a longitudinal cross-sectional view when the direction is corrected.
) Cutter part, (2) Fixed part, (3) Rotating part, (4) Pin, (5) Cutter shaft, (6) Reaction force receiver, (7) Rotating shaft, (8) Drive device, (9) Mounting 7 lunge, (a) discharge hole, aD soil discharge port, 0" IJ fixing hole, one-way correction jack, a4-direction correction jack head, a sai jack bin,
aI6 earth discharge pipe, fin ball seat, ■stopper, a→oscillating blade opening, (to) hole, Qυ moat excavation casing, @water stop seal, @water pressure pipe, bent pipe section. Agent: Tadashi Sato, Patent Attorney, Same: Saburo Kimura, Same: Muneharu Sasaki, Figure 8■ Figure 9, 1owa

Claims (2)

[Claims] (1) In a propulsion method in which the pipe is propelled into the ground by a jack or the like installed in a starting pit, a drive device and A cutter section having an internal soil discharging hole and driven by the drive device is provided in the lifting device, and a cutter that can be freely lowered forward is provided in the cutter section.
An excavation propulsion method characterized in that (b) the cutter section and the drive device are accommodated in a starting pit through a pipe as necessary. (2)) A cutter unit equipped with a cutter that can be freely folded forward and its rotating shaft, and a driving device that is connected to the excavation casing via a water stopper and drives the rotating shaft in the central space. A swinging blade opening provided so as to be fixed, and four or two pieces provided between the swinging blade opening and the excavator casing, one end of which is coupled to the excavator casing and the other end provided to a free jack head. a direction adjusting jack in which a jack bin passes through the mounting 7 langes of the drive device and is fixed to the swing tuyere; and a drain hole provided in succession with an earth removal hole having an inner thigh opening on the side surface of the drive device. An excavation propulsion device comprising a clay pipe and a ball seat provided near the front end of the cough discharge pipe.